Indoor air quality grading and measurement method based on light scattering
A technology of indoor air quality and measurement method, applied in the field of indoor air quality classification measurement based on light scattering, can solve the problem of few indoor air quality classification measurement methods, and reduce the difference of detector response and stray light interference, avoiding response differences, and the effect of simple principles
Pending Publication Date: 2020-08-07
李童言 +1
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Problems solved by technology
At present, there are many methods for directly measuring the concentration characteristics of particulate matter, but they are basically used in scientific research or outdoor environmental monitoring, and a simple, easy and low-cost particulate matter measuring device directly used in indoor spaces has not been reported. The quality of air quality is closely related to the health of the general public, and there are very few methods for measuring indoor air quality classification
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[0024] like figure 1 As shown, a method for measuring indoor air quality classification based on light scattering, 1. The core device of the method described in this patent is the scattering chamber 2, and the scattering chamber 2 is made of cast aluminum with a hollow cylindrical cavity, consisting of two semi-cylindrical cavities It is composed of O-rings and a series of screws fixed together, and the two semi-cylindrical joint surfaces are perpendicular to the horizontal direction. The cavity is plated with high reflection film, and silver plating is selected as the inner surface coating material in this patent.
[0025] 2. There are air inlet 7, outlet 8, beam inlet 9, and beam outlet 10. The axis line connecting the air inlet 7 and outlet 8 is located on the vertical plane of the scattering chamber 2; the beam inlet 9 and the beam outlet 10 are both located in the scattering chamber On the horizontal diameter of 2, the beam entrance 9 is connected to the laser light sour...
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The invention discloses an indoor air quality grading and measurement method based on light scattering. Based on the characteristics of interaction between light and particles, the positive correlation between the scattered light intensity of the particles and the total concentration of the particles and the like, a correlation law curve between the scattered light and the particle concentration,namely the air quality, is obtained through the laboratory calibration and by utilizing the ratio of the scattered light to the reference light. According to the present invention, the scattering effect of the particles on the light is directly measured, the suspension state of the particles is not changed in the measurement process, the response difference of a detector and the interference of the stray light are effectively avoided in the measurement process, and the air quality can be continuously measured on line and in real time; the method has the characteristics of simple principle, convenience in operation and high detection speed; the method has the good application prospects for the quantitative monitoring of the air quality of the public places by the environmental protection departments, the quantitative reminding of the indoor air quality by citizens and the heavy pollution alarm.
Description
technical field [0001] The invention relates to a grading measurement method of indoor air quality based on light scattering, which can measure and display the pollution level of indoor air quality in real time, and can bring convenience to people's life. Background technique [0002] Atmospheric particulate matter, especially pollution particulate matter, is an important factor in the physical and chemical processes of the atmosphere. The existence of atmospheric particulate matter particles directly affects the propagation of light in the atmosphere, resulting in the attenuation of light in the atmosphere. In recent decades, with the rapid development of industrial economy, the problem of air pollution has become more and more serious, and the climate has become more and more complex. The particulate matter in the air has brought serious harm to people's health. The concentration of particulate matter directly reflects the degree of air pollution. Particulate matter pollut...
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Login to View More IPC IPC(8): G01N15/06G01N21/53G01N21/27
CPCG01N15/06G01N21/53G01N21/274G01N15/075
Inventor 李童言尚永颍李学彬
Owner 李童言